Answer:
Step-by-step explanation:
This uh
5×21/-1+9
105/-1 +9
-105 +9
-96
hope that helps
First, work out the difference(increase) between the two numbers you are comparing. So, the difference would be <em>100-80</em>, which will equal <em>20</em>.
Then, divide the increase by the original number and multiply the answer by 100. So, that would be <em>20÷100</em>, which would be <em>0.2</em>, then it would be <em>0.2⋅100</em>, so back to <em>20</em>.
The percent of increase should be 20.
Step-by-step explanation:





option C